JP4978443B2 - Special work cart device for PC block installation work for preventing falling bridges - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a special work cart device for a fallen bridge prevention PC block mounting construction used for a fallen bridge prevention PC block mounting construction for preventing a bridge girder or the like from falling from a pier or an abutment during an earthquake or the like. .

  In general, as shown in FIG. 7, a steel falling bridge prevention stopper bracket 16 is attached to the bridge girder 15, and a falling bridge prevention PC block 8 is attached to the bridge pier (or abutment, the same shall apply hereinafter) 14. Measures are taken to prevent a catastrophe from falling from the pier 14 and causing a major disaster.

  Conventionally, as a construction technique for attaching the above-mentioned bridge prevention PC block 8 to the pier 14, as shown in FIG. 7, an anchor is placed under the bridge girder 15 and a chain block (not shown) is attached thereto. The above-described fallen bridge prevention PC block 8 is lifted and carried close to a predetermined position, and the fallen bridge prevention PC block 8 is manually moved to the mounting position in a suspended state, and is attached to the head of the PC block mounting anchor bolt 11 previously attached to the bridge pier 14. The position of the mounting anchor bolt hole 9 opened in the PC block 8 was aligned, and then the PC block 8 was inserted into the mounting anchor bolt 11 and attached to the pier 14.

  Conventionally, as shown in FIG. 8, a tip jig 18 for attaching a fall prevention PC block is provided at the tip of the telescopic boom 17 of the crane 19, and the fall prevention PC block 8 is attached to the tip jig 18 for attaching the PC block. There has been a technique of setting and moving the fallen bridge prevention PC block 8 to the mounting position of the pier 14 while adjusting the height and position with the telescopic boom 17. (For example, see Patent Document 1)

Further, a construction technique using an aerial work vehicle in which a work deck is provided at the tip of a boom that can be lifted and swung in place of the crane 19 and can be expanded and contracted has been proposed. (For example, see Patent Document 2)
JP-A-11-147691 JP 2005-133324 A

  However, the installation work by the chain block is performed by moving the falling bridge prevention PC block 8 in an unstable state in which a heavy object such as the falling bridge prevention PC block 8 is suspended in a narrow space above the operator's head. Since the mounting anchor bolt hole 9 opened in the block 8 must be aligned with the head of the mounting anchor bolt 11, not only does it take a lot of time and effort, but it is necessary to assemble a separate scaffold for work and prevent falling bridges. Since the PC block 8 was hooked and lifted, there was a problem that the PC block made of concrete was chipped and the quality of the fall bridge prevention work was deteriorated.

  Further, in the case of using the PC block mounting tip jig 18 at the tip of the crane telescopic boom 17 of the above-mentioned Patent Document 1, since the operation is a remote operation from a remote crane operator's cab, the position of the falling bridge prevention PC block 8 and It is difficult to finely adjust the posture and inclination of the PC block 8, which takes time and labor, and in order to prevent interference with the crane telescopic boom 17, it is necessary to partially remove the safety handrail of the work scaffold. There were also problems such as being dangerous work. In the case of the installation work for preventing the falling bridge PC block using the aerial work vehicle of Patent Document 2, there was a problem similar to that of Patent Document 1.

  Furthermore, in general, the construction site for the fall prevention work is under the bridge, so the scaffolding is bad, and there are many places where large crane vehicles and aerial work vehicles are difficult to enter. If you want to install a work platform for a crane truck or an aerial work platform, you will need a high-strength work platform for work vehicles that weighs more than 10 times the weight of the PC block 8 that prevents falling bridges. Since the cost is enormous, it is difficult to set up such a working scaffold, and it is difficult to use a crane vehicle or an aerial work platform. In addition, in the case of a bridge in a mountainous area, the height of the pier 14 is often so high that it cannot be reached by a crane or an aerial work vehicle. In this case, a crane or an aerial work vehicle cannot be used, There was an unfavorable problem in terms of occupational safety and health, in which it was forced to carry out difficult manual installation work.

  The present invention has been made in order to solve the above-mentioned many problems of the present situation, and is intended to move, convey, move up and down, move up and down, adjust the vertical position, adjust the vertical and horizontal positions, It is an object of the present invention to provide a special work carriage device for installation work on the bridge pier 14 of the fall-bridge prevention PC block 8 that enables fine adjustment of the delicate posture and inclination of the fall-bridge prevention PC block 8 manually.

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
The special work cart apparatus A for the installation of a fallen bridge prevention PC block according to the first aspect of the present invention has a traversing roller 7 capable of traversing on the two H-shaped steel rails 13 temporarily installed on the work scaffold upper stage 12. A carriage 1, a raising / lowering frame 2 provided on the transverse carriage 1 by three raising / lowering posture control hydraulic jacks 5 a, 5 b, and 6 so as to be moved up and down, and a free roller provided on the lifting frame 2 This is a special work carriage device for installation work for preventing a fallen bridge PC block comprising a table 3 and a fallen bridge prevention PC block loading plate 4 that can move back and forth on the free roller table 3.

  Further, the work cart apparatus according to claim 2 has three lifting hydraulic jacks 5a, 5b, 6 that can be lifted and lowered individually, two on the front left and right, and one on the rear. It is characterized by supporting the lifting frame at three points, which makes it easy to determine the posture of the loaded bridge prevention PC block 8 and the tilting of the front and rear, left and right, and the subtle height position of the top and bottom via the lifting frame 2. It can be adjusted, and it is possible to delicately align the head of the PC block mounting anchor bolt 11 set on the pier 14 with the mounting anchor bolt hole 9 opened in the PC block 8, and it can be easily and safely prevented by hand. This is a special work carriage device for a fallen bridge prevention PC block installation work characterized in that the PC block 8 can be attached to the pier 14.

  According to the above configuration, the temporary two H-shaped steel rails 13 are installed on the work platform 12 provided on the pier 14 under the bridge, as long as necessary for the installation work of the falling bridge prevention PC block 8, By attaching the special work carriage A of the present invention, the falling bridge prevention PC block 8 can be taken into the special work carriage device from the top of the bridge and can be easily and safely installed manually.

  As described above, the use of the special work carriage device A for installing the fallen bridge prevention PC block 8 according to the present invention enables the fallen bridge prevention PC block 8 which is a heavy object when the fallen bridge prevention PC block 8 is attached to the pier 14. The horizontal and vertical position, the posture and the inclination of the work can be adjusted with high accuracy and efficiency, and the installation work of the PC block 8 for preventing the falling bridge can be safely performed manually on the work platform 12. Great industrial effects can be obtained from the aspect of quality and construction work safety environment. In particular, the effect of the use of the special work carriage device A for installing the anti-falling bridge PC block according to the present invention in many installation work sites where it has been difficult to use conventional crane vehicles and aerial work platforms in mountainous areas is There are remarkable things in terms of reducing the load and avoiding danger.

  As described above, the present invention has a great effect in terms of construction work quality, construction cost, and construction work safety and environment, and not only in the fall bridge prevention construction industry, but also in the safety of earthquakes of many bridges installed in the world. The improvement is ensured by high quality construction quality, which makes a great contribution to the world.

Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a front view showing a schematic configuration of a special work cart apparatus A for installation work for preventing falling bridge PC blocks according to the present invention. FIG. 2 and FIG. 3 are a side view and a plan view, respectively, showing a schematic configuration of the special work cart for the installation work of preventing the falling bridge PC block. FIG. 4 is a perspective view showing an example of a fallen bridge prevention PC block. The falling bridge prevention PC block 8 has a plurality of anchor bolt holes 9 for mounting the PC block in the block body, and the contact portion with the upper falling bridge prevention stopper absorbs the impact of the contact during an earthquake. An impact buffer plate 10 such as a honeycomb structure is attached.

  In FIG. 1, reference numeral 1 denotes a traversing cart to which a cart traversing roller 7 that can traverse two H-shaped steel rails temporarily installed on the upper surface of the upper deck of the work scaffold 12 is attached. Reference numeral 2 denotes an elevating frame that can be moved up and down by three elevating posture control hydraulic jacks 5 a, 5 b, 6 attached to the traversing carriage 1. A free roller table 3 is mounted on the upper surface of the elevating frame 2, and a falling bridge prevention PC block 8 is loaded on the free roller table 3, and the falling bridge prevention PC block 8 is mounted via the free roller table 3. A PC block stacking plate 4 that can be moved back and forth is mounted.

  As shown in FIGS. 2 and 3, the three hydraulic jacks for raising and lowering the vertical posture are provided with a PC block mounting anchor bolt hole 9 opened in the loaded fall prevention PC block 8 and attached to the pier 14. The PC block mounting anchor bolt 11 can be raised until it matches the head position, and the PC block 8 can be smoothly inserted into the mounting anchor bolt 11 so that the attitude of the fallen bridge prevention PC block and the front / rear / left / right inclination can be finely adjusted. As described above, three lifting / lowering attitude control hydraulic jacks 5 a and 5 b are supported at the front left and right positions of the traversing carriage 1 toward the pier 14, and one lifting attitude control hydraulic jack 6 is supported at the rear of the traversing carriage 1 at three points. They are arranged in a form that constitutes a mechanism.

  In this way, the lifting frame 2 is mounted on the traversing carriage 1 so that the posture and the tilt in the front, rear, left and right directions can be controlled via the three lifting posture control hydraulic jacks 5a, 5b, 6 supported at three points. . Therefore, by finely adjusting the three lifting / lowering posture control hydraulic jacks 5a, 5b, 6 respectively, it is possible to finely adjust the posture and the front / rear / left / right inclination of the fallen bridge prevention PC block 8 loaded on the carriage device. Thus, it is possible to easily adjust the position of the mounting anchor bolt hole 9 manually with respect to the mounting error of the PC block mounting anchor bolt 11.

FIG. 5 is an overall image diagram of work using the work cart apparatus A of the present invention.
FIG. 6 is a view showing an installation situation when the fall bridge prevention PC block 8 is attached to the pier 14 using the work carriage device of the present invention, and FIG. 6A shows the fall bridge prevention PC block as a PC block mounting anchor bolt. It is the state figure raised to the height position of 11 with the raising / lowering frame 2 of the work trolley apparatus A. FIG. 6B is a state diagram showing a state in which the fallen bridge prevention PC block 8 is set to the PC block mounting anchor bolt 11 attached to the pier 14.
Below, the actual operation | work point in the case of performing attachment work using the special work cart apparatus A for fallen bridge prevention PC block attachment work by this invention is demonstrated based on FIG. 5, FIG.

  First, the falling bridge prevention PC block 8 is hung from a small mobile crane 20 installed in one lane above the road bridge, and the bridge width is extended to the upper deck 12 of the work scaffold installed around the pier under the bridge. It is quietly loaded on the PC block loading plate 4 of the special work cart apparatus A for falling bridge prevention PC block mounting work of the present invention mounted on the two temporarily mounted H-shaped steel rails 13 mounted. After taking measures for preventing the fall of the loaded PC block 8, the carriage traverse roller 7 attached to the traversing carriage 1 is used to traverse to the lower part of the bridge pier 14 where the fall prevention PC block is attached.

  Next, after stopping the traversing carriage 1 at the mounting position of the PC block 8, the lifting frame 2 loaded with the falling bridge prevention PC block 8 using the three lifting posture control hydraulic jacks attached to the traversing carriage 1, The mounting anchor bolt hole 9 is raised until it comes to the position of the head of the mounting anchor bolt 11.

  Next, by operating two lifting / lowering posture control hydraulic jacks 5a and 5b attached mainly to the front left and right, the falling bridge prevention PC block 8 loaded on the PC block loading plate 4 on the lifting frame 2 is used. The position and the position of the mounting anchor bolt hole 9 are adjusted with respect to a slight shift of the mounting anchor bolt 11 set by finely adjusting the posture and the front / rear / left / right inclination. After accurately aligning the positions of the mounting anchor bolt holes 9 and the mounting anchor bolts 11, the PC block loading plate 4, which is set on the free roller table 3 mounted on the upper part of the lifting frame 2, can be moved back and forth. The PC block 8 is slid forward in a loaded state, and the PC block 8 is inserted and set in the PC block mounting anchor bolt 11 attached to the pier 14.

  When the falling bridge prevention PC block 8 is inserted and set in the PC block mounting anchor bolt 11, the work carriage A is operated again to bring the position of the falling bridge prevention PC block 8 to the predetermined position with respect to the pier 14. Fine-tune to fit.

  When the falling bridge prevention PC block 8 is placed in a predetermined position, a spacer prepared in advance is inserted into the gaps between all the mounting anchor bolt holes 9 and the mounting anchor bolt bolts to prevent the falling bridge prevention PC block from falling. Tighten the falling bridge prevention PC block 8 to the pier 14 with the nut.

  When all the PC block mounting nuts are tightened, the elevating frame is lowered, the PC block loading plate 4 is retracted to the original position, and the traversing carriage 1 is moved to the PC block unloading position, so that the next PC block Prepare for unloading.

  As explained above, by using the special work cart device A for installing a bridge prevention PC block for installation according to the present invention, a construction for preparing a simple scaffolding or a temporary H-shaped steel rail is performed by performing the installation work for the installation of a PC block for preventing a fallen bridge. By performing the above, it is possible to carry out the installation work with high efficiency and high installation quality while being easy and safe by hand.

The front view which shows schematic structure of the work trolley | bogie apparatus of this invention. The side view which shows schematic structure of the work trolley | bogie apparatus of this invention. The top view which shows schematic structure of the work trolley | bogie apparatus of this invention. Perspective view showing an example of a fallen bridge prevention PC block Whole work explanatory drawing using the work trolley | bogie apparatus of this invention (A) State diagram in which the PC block is raised to the height of the mounting anchor bolt using the work carriage apparatus of the present invention (b) State diagram in which the PC block is set on the mounting anchor bolt Installation state diagram of PC block The schematic diagram showing installation work using a crane

Explanation of symbols

A. Special work cart apparatus 1 for installing a PC block for preventing a falling bridge 1 Traversing cart 2 Lifting frame 3 Free roller table 4 PC block loading plate 5a Right front lifting posture control hydraulic jack 5b Left front lifting posture control hydraulic jack 6 Back lifting posture control hydraulic jack 7 Traverse roller 8 Falling bridge prevention PC block 9 PC block mounting anchor bolt hole 10 Shock buffer 11 PC block mounting anchor bolt 12 Working scaffold 13 Temporary H-shaped steel rail 14 for traversing bogie pier (or abutment)
15 Bridge Girder 16 Falling Bridge Prevention Stopper Bracket 17 Telescopic Boom 18 PC Block Mounting Tip Jig 19 Crane

Claims (2)

  A traversing carriage with a plurality of traversing rollers that can traverse on the traversing rail, three hydraulic jacks attached to the traversing carriage that can be moved up and down, and that can be moved up and down, and that can be moved up and down by the hydraulic jacks And a PC block loading plate that can be slid back and forth on the free roller table, and a special work carriage device for fallen bridge prevention PC block mounting construction comprising: .   The above three lifting / lowering posture control hydraulic jacks for lifting and lowering are mounted on the lifting frame by constructing a stable three-point support mechanism by attaching two on the left and right front and one on the rear. 2. The special work cart apparatus for installation work for prevention of falling bridge PC blocks according to claim 1, wherein fine adjustment control of the vertical position of the PC block and the posture inclination of the front, rear, left and right is made possible.

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